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The Kid Should See This

(NH4)2Cr2O7! Ammonium Dichromate Volcano

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(NH4)2Cr2O7! Or… an Ammonium Dichromate Volcano!

With some heat, these (highly toxic) orange crystals will thermally decompose as they release heat, nitrogen, water and green dichromium (III) oxide ash. 

Via laboiteverte.fr.

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